Title (Italian): Più Veloce Dell'Aereo -- This visualization represents the length (in kilometers) of high-speed rail in operation (red), under construction (dark blue), and planned (light blue) around the world. Maximum speed is indicated by the thickness of the arcs. France leads the way with the most length of track and highest speeds. The only high-speed train in the United States is Amtrak's Acela line consisting of 240 km of track and capable of 150 mph.